Did I break my screen?

I am having another issue with my screens. I had to set my project aside for the summer and started testing all of my components this past weekend. I have two screens - one is a backup sensor, but I was having issues with that scrolling so I bought this one http://www.buydisplay.com/default/5-lcd ... iver-board. I plugged them up to my N64 motherboard and used my power regulator circuit, but cannot get video on either. At first, I thought the issue with with my motherboard, but I tried the screens with a GC that I knew worked, and still couldn't get them working. I used the batteries that I have bought for the portable, so they are both getting 7.4 V. I just wasn't sure what else I should be doing to figure this out.

Thanks in advance. This is my first portable, so I definitely need the help.
 
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